HardwareSerial::end() won't detach RX/TX from IO MUX when it is executed isolated

[SuGlider]

Using, for instance, ESP32S3 GPIO 43 and/or GPIO44 for OneWire:

GPIOs 43 and 44 are default UART pins.
The issue seems related to being able to detach the GIPOs 43 and 44 from IO Mux and UART.
The execution of Serial0.end() shall do it, but I read the code again and realized that because, it has never been initialized, it also doesn't run the code to detach the IO MUX.

Therefore, @teastainGit, please try you code in this way:

void setup() {
  // Serial0 is the UART0 when the S3 CDC is enabled
  Serial0.begin(115200); // this will initialize the UART with GPIOs 43 and 44, marking those pins to be detached
  Serial0.end(); // this will detach GPIOs 43 and 44
  
  // code as usual...
  Serial.begin();
  delay(200);
  Serial.println(" setup ");
  delay(200);
  sensors.begin();
}

Originally posted by @SuGlider in #8324 (comment)

[VojtechBartoska]

Task update:

• should be handled also by Peripheral Manager

[teastainGit]

So, thanks guys for all your support, but it still does not 'work' !
Shown below is my LilyGO LilyGO T-Display S3 breadboard test setup, with the DS18B20 'onewire'.

I uploaded your sample code and as before it did not return the temperature:
I get 13:56:36.242 -> -127.00ºC
When I use pin1 in the sketch and move it over to the test position to the right with the coloured wires I get:
(pin1 is yellow in both examples)
14:10:31.317 -> 24.62ºC
Both a TMP102 I2C temp sensor and a I2C SHTx sensor work on both positions!
[observation] when uploading your suggested sketch the tiny LED on the DS18B20 flickers, in a way that looks like the visual representation of serial info.
Neither 43 or 44 work with the onewire device.
I hope this extra info is helpful.
-Terry

[teastainGit]

The final solution was to edit the helper header file in OneWire library and change to <33 pin number limit maximum to any number. (Suggested by someone in this repository !)

GPIO 43 and 44 now work with the dallas semiconductor temperature sensor!

I notified the authors of OneWire with An Issue and offered to make a PR, but no response.

thanks for all of your help, it is resolved.
-Terry